454 Canadian Record of Science. 



Bradoeia vigilans. pi. II., fio-s. 2 a to c. 



Bradoria vigilans, n. sp. Nat. Hist. Soc. N. B. Bull, vol. IV. 

 p. 205. pi. iv. figs 2 (X to c. 



" Outline of the valves ovate, somewhat pointed behind, 

 moderately arched transversely the valves somewhat ridged 

 lengthwise. The right valve has a hinge-line about half 

 of the length of the valve, which is flattened down at the 

 hinge forming there a lance oval area. There is a promi- 

 nent tubercle at the front of the hinge surrounded by a 

 shallow groove. The margin is gradually rounded from 

 the front, and projects somewhat at the posterior end, 

 whence the posterior cardinal curve goes directly upward 

 to the back of the hinge. 



Sculpture. The surface is marked by close set granulations, 

 that become finer toward the hinge-line and the ocular 

 tubercle ; at the posterior quarter of the valves the granu- 

 lation graduates into a series of subparallel anastomosing 

 ridges. 



Size. Length 3-| mm. Width 2| mm." Depth | mm. 



Horizon and locality. Found in Assise E. 3 e. of the Upper 

 Etcheminian, Dugald Brook, Escasonie, Cape Breton. 



"Distinguished from Ajparchites'conchiformis of the Pro- 

 tolenus Fauna, by its smaller size and prominent tubercle; 

 and from A. secunda by the tubercle and the coarser orna- 

 mentation," as well as by the angulated projection at the 

 end of the valve. 



An additional example of this species from the bed in 

 which the original was found, and three others from a 

 layer about a foot lower in the measures, give additional 

 information of the species. 



These examples are wider than the type. The ocular 

 tubercle in this species is a little off from the hinge-line. 

 The cardinal slopes are long and the anterior marginal 

 slope is somewhat straightened. 



